B01J 20/28021
Hollow particles
Official title: {Hollow particles, e.g. hollow spheres, microspheres or cenospheres}
B01J20/28021 (Hollow particles) appears on 152 US grants and 149 published applications in this corpus.
Search patents in B01J- Granted patents
- 152
- Published applications
- 149
- Assignees
- 152
- Inventors
- 527
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 7 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 9 | 0 |
| 2000 | 1 | 0 |
| 2001 | 7 | 1 |
| 2002 | 2 | 3 |
| 2003 | 2 | 3 |
| 2004 | 2 | 3 |
| 2005 | 3 | 7 |
| 2006 | 2 | 4 |
| 2007 | 2 | 1 |
| 2008 | 2 | 4 |
| 2009 | 2 | 5 |
| 2010 | 1 | 3 |
| 2011 | 4 | 0 |
| 2012 | 1 | 5 |
| 2013 | 4 | 5 |
| 2014 | 3 | 6 |
| 2015 | 4 | 3 |
| 2016 | 2 | 4 |
| 2017 | 1 | 6 |
| 2018 | 4 | 9 |
| 2019 | 6 | 13 |
| 2020 | 8 | 9 |
| 2021 | 10 | 22 |
| 2022 | 7 | 10 |
| 2023 | 10 | 10 |
| 2024 | 14 | 4 |
| 2025 | 5 | 3 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Composite material and method for removing pollutant from polluted water19 May 2026US 12,629,653 B2Beijing University of Chemical Technology
- Superficially porous organic polymer particles19 May 2026US 12,629,656 B2Waters Technologies Corporation
- Encapsulation composition27 Jan 2026US 12,534,593 B2LG Chem.Ltd.
- Sorbent composition for pre-analytical treatment of samples9 Dec 2025US 12,492,974 B2Immundiagnostik AG
- Metal sulfides on alkali earth particle substrates25 Nov 2025US 12,478,944 B2Atlas Carbon, LLC
- Absorbent composite materials, absorbent articles comprising absorbent composite materials, and methods of making thereof17 Sep 2026US 2026/0273506 A1Kimberly-Clark Worldwide, Inc.
- Superficially porous organic polymer particles10 Sep 2026US 2026/0264046 A1Waters Technologies Corporation
- Method for preparing porous adsorbent particles, a porous adsorbent particle and sampling device, and use thereof3 Sep 2026US 2026/0257199 A1Imperial College Innovations Limited
- Composite material for remedying soils with contamination of heavy metals and method therefor20 Aug 2026US 2026/0241363 A1Beijing University of Chemical Technology
- Medium for quantitatively removing water from a gas stream containing sulphur and/or sulphur-containing compounds, device for this purpose, and use of said medium23 Jul 2026US 2026/0208160 A1Elementar Analysensysteme GmbH
Most cited
By later US patents
- Calcium phosphate microcarriers and microspheres198US 6,210,715 B1CaP Biotechnology, Inc. · 2001
- Method for making hollow porous microspheres166US 4,671,909 A1987
- Hollow porous microspheres made from dispersed particle compositions150US 5,397,759 A1995
- Hollow porous microspheres as substrates and containers for catalyst136US 4,793,980 A1988
- Hollow porous microspheres made from dispersed particle compositions128US 5,212,143 A1993